We all are aware of why technology is important for human beings in their life. In ancient times, nothing is like a machine. For every type of work, human beings require to get physically involve. Like a burning fire, cooking food, transportation, farming, etc. After few decades, human beings started the use of animals for various works like farming, transportation, etc.
Inventions of the wheel are the start of the new era of technology. Human starts using new machines which can reduce time to do work. With time so many machines were getting in action. Human beings getting to know the importance of technology.
B because A seems like he was resigned because he was doing something wrong but B makes it seem like he was resigned because of his health and they wish him well,